Form clamp



April 29, 1930. l H, H, LAMPERT 1,756,691

FORM CLAMP Filed June 8. 1928 Patented Apr. 29, 1930 UNET'ED STATES HENRY H. LAMPERT,

FORM

OF CHICAGO, ILLINOIS CLAMP This invention relates to clamps and particularly clamps of the type including a beam on which a pair of cleats is supported for embracing part of a mold. Clamps of this general class are shown in my co-pending applications Serial No. 272,108, filed April 23, 1928,

and Serial No. 274,494, filed May 2, 1928,

wherein they are illustrated in connection with molds used in the construction of concrete girders and j oists. In my aforementioned clamps, the cleats were adjustably secured to the supporting beam by separate bolts. n

The main objects of this invention are to provide a clamp having an improved form of cleat; and to provide a cleat of this kind having improved integral fastening means for attachment to the beam.

An illustrative embodiment of this invention is shown in the accompanying drawing,

wherein Figure 1 is a transverse section of a concrete form having an improved clamp applied thereto.

Fig. 2 is a transverse section, taken on the line 2 2 of Fig. 1.

Fig. 3 is a fragmentary top plan of a portion of the clamp, showing one of the' cleats.

Fig. 4 is a side elevation of the same, taken u from the right of Fig. 3.

Fig. 5 is a perspective of one of the cleats.

In the form shown, the improved clamp is applied to a mold comprising a sollit section 1 and a pair of side wall sections 2 arranged to form a channel which is supported on the clamp and which is suspended from a structural shape 3 by a flexible tie band 4.

The soilit 1 is spaced from the bottom ange of the structural shape 3 by a pair of spacing` blocks 5. The ends of the tie band 4 are secured to the top flange of the structural shape by clips 6 and the band is looped to form a sling which embraces the soiiit 1 and a portion of the improved clamp.

proved clamp Vcomprises a beam 7 adapted to support the mold sections and having a pair of adjustable cleats 8 movable longitudinally of the beam for engaging the outer faces of the side sections 2.

vIn the construction illustrated, the imrilhe beam 7 comprises a pair ofangle bars 9 arranged in substantially parallel spaced relation and secured together by bolts 10 having spacer blocks 11 located between the bars. The space between the bars 9 forms a guideway or slot 12 for the cleats 8 and also for receiving` the bight of the tie band 4.

Mounted in the slot 12, is a. pair of bearing members 13, which engage the inside of the sling and which are adjustable longitudinally of the beam 7 for accommodating slings of dierent sizes. rIhe members 13 are adjustably secured to the beam 7 by pins or nails 14 extending through apertures 15 in the angle bars 9.

The cleats 8 are preferably metal castings and each comprises a shank 16 of rectangular cross section which is slidable in the guideway 12 and which is disposed transversely of the beam '7. f

Integrally formed on one edge of the shank 16, adjacent its upper end, is a head 17 having a flat bearing face 18 adapted to bear against the outer surface of the adjacent side section 2.

Formed on the lower end of the shank 16, is a foot 19 provided with a pair of grooved bearing members or shoulders 2O adapted to engage the lower edges of the angle bars 9.

Formed in the shank 16, is a keyway 21 in which is seated a wedge 22 adapted to span the guideway 12 and to engage the upper lianges of the bars 9 for clamping the cleat in its adj usted position.

In operation, the mold sections are supported on the beam 7 which is suspended by the tie band 4. The two cleats 8 are then moved inwardly to bring the faces 18 into Aengagement with the side walls 2, and the wedges22 are then driven into position for clamping the cleats against movement longitudinally of the beam.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that certain details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claim.

I claim:

In a clamp of the ,class described, a beam comprising a pair of spaced angle bars, two f legs of said angle bars being arranged in spaced parallel planes so as to provide a slot in said beam, the other legs of said angle bars being arranged in a single plane so as to provide a seat, a cleat supported on said beam and including a shank extending through said slot, a head integrally formed on one end of said shank and having grooves therein for receiving the edges of said parallel legs, said shank having a keyvvay, and a Wedge in said keyvvay spanning said slot for bea-ring between the seat of said beam and one end of said keyvvay to lock said cleat against movement longitudinally of said slot.

Signed at Chicago this 1st day of June, 1928.

HENRY H. LAMPERT. 

